Nannofossils

Where in NZ Widespread in marine sedimentary rocks
When Late Triassic (227 million years ago) to present
Scale 3 – 30 µm
Two coccolithophorids

Two coccolithophorids

What are they?

  • Any microfossil plant remains that are made of calcium carbonate (lime) that is smaller than about 30 µm (0.03 of a millimetre).
  • Wide variety - originating from different types of plant organism.
  • Most common are parts of single celled marine algae that produce circular calcite plates or scales called coccoliths

Used for?

See some examples in our image gallery.